Christensen, V.; Grimes, J.; Rowland, R.; Ort, D. Effect of Chelated Calcium Proteinate Fed in the Maternal Diet of Turkey Breeders on Embryo Cardiac Physiology and Poult Quality. Int. J. Poult. Sci. 2006, 5 (4), 337–343. https://doi.org/10.3923/ijps.2006.337.343.